Resumo

LOPEZ-MARTINEZ, Hugo et al. Population genetic structure of the sand lizard, Uma exsul Schmidt and Bogert, 1947, in the Chihuahuan desert. Biotecnia [online]. 2020, vol.22, n.1, pp.102-108.  Epub 03-Ago-2020. ISSN 1665-1456.  https://doi.org/10.18633/biotecnia.v22i1.1156.

Uma exsul is a micro-endemic species of the Chihuahuan desert, listed as an endangered species in NOM-059-SEMARNAT-2010. The objective was to determine the genetic population structure of U. exsul, assuming that the distribution allopatric populations constitute different lineages. Methodology: 14 field trips where carried out, collecting 24 biological samples. Cytochrome b was used for BAPS analysis. The TCS program was used to determine the haplotype pattern. We calculated Tajima’s D to determine the selection or drift of populations and an AMOVA to determine the Fst and the population gene flow. A low selection was recorded (Tajima’s D = 0.000, p ≤ 0. 001). The AMOVA interpopulation 12.91% is low, the intrapopulation is high (87.09%), with Fst: 0.13113 and Nm: 3.31 (p < 0.001). There is an incipient structure with an evolving population without selection and high interpopulational genetic flow in Viesca; Estación Marte had a recent selective sweep and subsequent population expansion after a recent bottleneck. We conclude that the samples make up three genetic groups, considering the Estación Marte population as an allopatric population.

Palavras-chave : haplotypes; allopatry; genetic structure; genetic group; Fringe-toed lizard.

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